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What are the causes of irregular folds in the sheet metal of automobile stamping parts?

The collision of the car body may cause irregular folds in the sheet metal of automobile stamping parts. When repairing, if it is convenient and feasible, the folds can be unraveled by the pulling method of the car, and then knocked flat; under repair.

The key to opening pleats is to first try to pry open the dead pleats from the inside to ease the live pleats, then heat them up, and hit the ridges of the live pleats with a hammer to gradually expand them and restore their original shape.

For example, the right wing of a car body is collided with the front, forming folds, and the following repair methods can be used:

First, remove the headlight ring and the lamp socket, and use a suitable flat iron to pad the inside of the headlight hole, so that the two ends of the flat iron are stuck on the curved edge of the light hole. Tie one end of the wire rope to the flat iron and the other end to the stump, and then drag it backwards, so that the large dead folds are basically corrected. The wings are then removed and trimmed on the work platform.

Heat the deadfold with a torch, pry it open with a pry tool to ease it, and heat a section to pry open a section. Then place the concave side of the wing plate on the platform, and tap the movable pleat from one side of the wing plate. When knocking, the platform must act as a bolster. After the folds on the inside are basically flattened, turn the flaps over, use a horn on the inside, and tap from the outside to the inside to fully expand the folds.

Then install the wing on the car, and carry out a comprehensive trimming with a hand hammer and a horn. When repairing the lamp hole, first complete the circle, then complete the side. After the large sample is trimmed, the two sides are compared, the stretched part is shrunk by heating, and the whole shape is made to meet the standard by meticulous fabrication.

Automotive Sheet Metal Fabrication

Pintejin Sheet Metal shop offers a cost-effective solution for a wide range of industries with our custom metal stamping and custom sheet metal fabrication capabilities. Our stampnig operations include a variety of sheet-metal forming manufacturing processes, such as punching, blanking, embossing, bending, flanging, and coining. Our professional, experienced and well-trained engineers can execute the complex metal stamping operations with precision and accuracy.

No matter what your metal fabrication needs are, Pintejin can offer the right solution: from single sheet metal part or sub-assembly of stamped metal parts to turnkey solutions for mechanical and electrical assemblies. We have the technology, equipment and the experience to fabricate customised metal products from aluminium sheet metal fabrication, steel, zinc plated steel, stainless steel sheet metal fabrication, brass and copper. Designs that require CNC machining of surfaces or components can be accommodated. We can supply polished, galvanized, zinc coated or powder coated finishes for any sheet metal work or stamped metal components. Coupled with our accurate and reliable metal fabricating equipment, we guarantee precision and repeatability in custom sheet metal work. You’ll be taking advantage of the best sheet metal fabrication china can produce.


With Pintejin automated and highly streamlined sheet metal fabrication service, you can expect a sheet metal fabrication quote within 12 hours and lead times as quickly as three days.Our rapid prototyping offering also includes a solid and reliable manufacturing capability (led by our expert team with 15+ years of experience) and technical and quality assurance, including SGS and RoHS material certifications, in-process quality reports, and First Article Inspection.



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